1970

5.5

1972

6.3

1969

6.1

1975

5.5

1972

6.8

1964

6.5

1965

6.3

1974

5.9

1973

5.7

1971

6.1

1975

5.8

1966

6.5

1965

6.2

1965

6.6

1967

6.6

1966

0.0

1978

6.5

1967

6.6

1965

6.7

1975

5.5

1966

0.0

1980

7.1

1970

5.5

1972

6.0

1968

0.0

1970

6.2